The open letter came on a day several organisations held demonstrations.

Assam's Manas National Park welcomes a greater one-horned rhino calf.

A glacial lake outburst at Shintaphu Lake in Bhutan has destroyed local facilities and prompted urgent flash-flood warnings across districts in West Bengal and Assam.

India's ambitious 11,200 MW Siang Dam project to counter Chinese infrastructure has sparked intense protests and security crackdowns in Arunachal Pradesh.